The USSR launched the Venera series to study the planet Venus, the Venera 7 probe being the first spacecraft to make a controlled landing on another planet.
Mariner 2 (Nasa fly-by) Venera 2 (USSR fly-by) Venera 3 (USSR landing, destroyed in atmosphere upon landing) Venera 4 (USSR probe landing) Mariner 5 (Nasa fly-by) Venera 6 (USSR probe landing) Venera 7 (USSR probe landing) Venera 8 (USSR landing) Mariner 10 (Nasa fly-by on way to Mercury) Venera 9 (USSR orbiter and landing) Venera 10 (USSR orbiter and landing) Pioneer Venus 1 (NASA orbiter) Pioneer Venus 2 (4 separate NASA probes) Venera 12 (USSR lander and orbiter) Venera 11 (USSR lander and orbiter) Venera 13 (USSR lander and orbiter) Venera 14 (USSR lander and orbiter) Venera 15 (USSR orbiter) Vega 1 (USSR probe and Comet Halley flyby) Vega 2 (USSR probe and Comet Halley flyby ) Galileo (NASA fly-by on way to Jupiter)
Mariner 2 (NASA fly-by) Venera 2 (USSR fly-by) Venera 3 (USSR landing, destroyed in atmosphere upon landing) Venera 4 (USSR probe landing) Mariner 5 (Nasa fly-by) Venera 6 (USSR probe landing) Venera 7 (USSR probe landing) Venera 8 (USSR landing) Mariner 10 (Nasa fly-by on way to Mercury) Venera 9 (USSR orbiter and landing) Venera 10 (USSR orbiter and landing) Pioneer Venus 1 (NASA orbiter) Pioneer Venus 2 (4 separate NASA probes) Venera 12 (USSR lander and orbiter) Venera 11 (USSR lander and orbiter) Venera 13 (USSR lander and orbiter) Venera 14 (USSR lander and orbiter) Venera 15 (USSR orbiter) Vega 1 (USSR probe and Comet Halley flyby) Vega 2 (USSR probe and Comet Halley flyby ) Galileo (NASA fly-by on way to Jupiter)
The probe "Venera 7" sent by the USSR was the first. It landed on the planet Venus, in 1970 I think.
1969.
The US sent the Voyager probes, Viking probes, and New Horizons probe to explore space, while the USSR sent the Venera probes, Luna probes, and the Mars probes. These space probes played crucial roles in advancing our understanding of the solar system and beyond.
venus
The Venera series of probes sent by the USSR .
Venera 7 was developed by the Soviet Union and launched on August 17, 1970. It became the first spacecraft to successfully transmit data from the surface of another planet, specifically Venus, on December 15, 1970. The mission marked a significant achievement in planetary exploration.
Two dogs, named Belka and Strelka, were launched on a rocket by the USSR in 1959. They became the first living beings to safely return to Earth after orbiting the planet.
The robots that have explored Venus include the Soviet Venera program missions, such as Venera 7, Venera 9, and Venera 13. The most recent mission to Venus was the Akatsuki probe launched by the Japan Aerospace Exploration Agency in 2010.
The following spacecraft sucessfully flew to Venus (some did not accomplish their mission goals, or were only fly-bys, but did reach the vicinity of the planet): Sputnik 7 - Venera 1 - Mariner 1 - Sputnik 19 - Mariner 2 - Sputnik 20 - Sputnik 21 - Venera 1964A - Venera 1964B - Cosmos 27 - Zond 1 - Venera 2 - Venera 3, Venera 4 - Mariner 5 - Cosmos 167 - Venera 5 - Venera 6 - Venera 7 - Cosmos 359 - Venera 8 - Cosmos 482 - Mariner 10 - Venera 9 - Venera 10 - Pioneer Venus 1 - Pioneer Venus 2 - Venera 11 - Venera 12 - Venera 13 - Venera 14 - Venera 15 - Venera 16 - Vega 1 - Vega 2 - Galileo - Magellan -Cassini - Venus Express - MESSENGER - Planet-C (Venus Climate Orbiter) (See the related link below)
The first planet to be explored by a space probe is Venus. Hope this helps. : )